Geochronology and thermochronology by the 40Ar/39Ar method:
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
New York [u.a.]
Oxford Univ. Press
1988
|
| Schriftenreihe: | Oxford monographs on geology and geophysics
9 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Literaturverz. S. 191 - 208 |
| Beschreibung: | XI, 212 S. zahlr. graph. Darst. |
| ISBN: | 0195043022 |
Internformat
MARC
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Datensatz im Suchindex
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|---|---|
| adam_text | Titel: Geochronology and thermochronology by the 40AR/39AR method
Autor: MacDougall, Ian
Jahr: 1988
CONTENTS
Chapter 1 Historical introduction
1.1 General comments
1.2 Historical outline
Chapter 2 Basis of the 40Ar/39Ar dating
method
2.1
2.2
2.3
2.4
2.5
2.6
2.7
Potassium-argon dating
40Ar/39Ar dating
Potassium and its isotopes
The 40K decay scheme and constants
Derivation of age equations
Atmospheric argon
Materials suitable for dating
2.7.1 Introduction
Feldspars
2.7.2.1 Alkali feldspar
2.7.2.2 Plagioclase
Feldspathoids
Micas
Biotite and phlogopite
Muscovite
Lepidolite
Glauconite
2.7.2
2.7.3
2.7.4
2.7.4.1
2.7.4.2
2.7.4.3
2.7.4.4
2.7.5 Amphiboles
2.7.6 Pyroxenes
2.7.7 Whole rocks
2.7JA Volcanic rocks
2.7.7.2 Metamorphic rocks
2.7.8 Glass
2.7.9 Clay minerals
2.7.10 Evaporites
2.8 Range of applicability
Chapter 3 Technical aspects
3 1 Introduction
Sample preparation
Monitor minerals
Nuclear reactions
Nuclear reactors as a neutron source
The 39K(n,p)39Ar reaction
Interfering nuclear reactions and
correction factors
3.7.1 General
3.7.2 Reactions on calcium
3.7.3 Reactions on potassium
3.7.4 Reactions on chlorine
3.2
3.3
3.4
3.5
3.6
3.7
9
12
14
15
17
19
21
21
22
22
23
24
25
25
26
26
26
27
28
28
29
32
33
34
35
35
40
40
40
41
43
44
47
51
51
51
55
57
3.8 Optimization of irradiation parameters 57
3.8.1 Introduction 57
3.8.2 Sample size 58
3.8.3 Production of sufficient 39Ar 59
3.8.4 Minimization of reactor-induced
40Ar interference 60
3.8.5 Minimization of interference from
40Ca(n,na)36Ar reaction 60
3.8.6 Interference from the
42Ca(n,a)39Ar reaction 62
3.8.7 Other interferences 62
3.8.8 Conclusions 63
3.9 Neutron flux gradients 63
3.10 Self-shielding 66
3.11 Temperature effects 66
3.12 Lattice damage 66
3.13 Decay factors 67
3.14 Total sample activity 67
3.15 Safety aspects 68
3.16 Argon extraction systems 69
3.16.1 Introduction 69
3.16.2 Pumps and pressure
measurement 69
3.16.3 Furnaces 70
3.16.4 Temperature monitoring 72
3.16.5 Gas cleanup 72
3.16.6 Extraction system blanks 73
3.17 Mass spectrometry 73
3.17.1 Introduction 73
3.17.2 Basic concepts 74
3.17.3 Ion sources 78
3.17.4 Ion detection and collection 78
3.17.5 Static mode operation 79
3.17.6 Machine calibration 80
3.17.7 Orifice correction 8!
3.17.8 Data acquisition 82
3.17.9 Calculation of 40Ar* 39ArK 83
3.17.10 Error estimates 85
Chapter 4 Interpretation of results: age spectrum
and isochron approaches 86
4.1 Introduction 86
4.2 Single-site diffusion (Turner model) 86
4.3 Age spectra conforming to a single-site
diffusion model 93
4.4 Slow cooling models 96
4.5 Numerical solutions 97
4.6 Mixed phases 99
GEOCHRONOLOGY AND THERMOCHRONOLOGY BY THE 40Ar/«Ar METHOD
4.7
4.8
4.8.2
4.8.3
4.8.4
4.8.5
4.9
4.10
4.11
4.12
Resolution within the age spectrum 106
Excess argon 106
4.8.1 Introduction 106
Excess 40Ar uptake by a
homogeneous phase 107
Excess 40Ar uptake by a
mixture 108
Excess 40Ar and flat release
patterns 110
Excess 40Ar and variable age
spectra 110
Recoil distribution of 39Ar 110
Grain size and distribution 112
Phase changes in vacuum 113
Behavior of minerals and whole rocks 114
4.12.1 High-temperature alkali
feldspar 114
4.12.2 Low-temperature alkali feldspar 115
4.12.3 Plagioclase
4.12.4 Feldspathoids
4.12.5 Biotite
4.12.6 Muscovite and phengite
4.12.7 Amphiboles
4.12.8 Pyroxene
4.12.9 Whole rocks
4.13
4.12.10 Evolution of illite to
muscovite
Isotope correlation diagrams
116
116
116
117
117
117
117
118
120
5.1
5.2
5.3
5.4
Chapter S Diffusion theory, experiments, and
thermochronology 127
Introduction 127
The process of diffusion 127
Phenomenological basis of diffusion
theory 128
Methods of solution for constant D
(or ê) 130
5.4.1 Plane sheet geometry 130
5.4.2 Semi-infinite medium 131
5.4.3 Spherical and cylindrical
geometries 131
5.5 Numerical approaches for variable D 131
5.6 Calculation of episodic 40Ar* loss 132
5.7 Slow cooling 133
5.7.1 Dodson s model 133
5.7.2 The mathematics of slow cooling 134
5.7.3 Closure temperature for first-
order loss and volume diffusion 134
5.7.4 Dodson s method of solution of
the accumulation-diffusion-cool-
ing equation in terms of heat
conduction with variable boundary
conditions 136
5.7.5 Closure profiles in minerals 136
5.7.6 Summary of Dodson s closure
temperature model
5.8 Solutions of the heat flow equation
5.8.1 Introduction
5.8.2 Simple uplift
5.8.3 Finite tabular pluton without
uplift
5.8.4 Dike with uplift and heat
generation
5.8.5 Model parameters
5.8.5.1 Introduction
5.8.5.2 Thermal properties and
dimensions
5.9 Diffusion studies and results
5.9.1 Background
5.9.2 Experimental criteria
5.9.3 Laboratory studies of argon
diffusion in natural silicates
5.9.3.1 Introduction
5.9.3.2 Biotite-phlogopite
5.9.3.3 Hornblende
5.9.3.4 Muscovite
5.9.3.5 Feldspars
5.10 Coupling of argon diffusion and heat
flow
5.10.1 Introduction
5.10.2 40Ar* loss from microcline
at Inyo Domes, California
5.10.3 The model
Appendix A.5.1 Separation of variables
solution for plane sheet
Appendix A.5.2 Laplace transform solution
for semi-infinite medium
Appendix A.5.3 Translation to spherical
coordinates
Appendix A.5.4 Closure temperature for
first-order loss
Appendix A.5.5 Sample diffusion calculation
138
139
139
139
140
141
142
142
143
143
143
145
147
!47
148
151
153
153
154
154
154
155
156
158
159
160
162
Chapter 6 Applications and case histories 163
6.1 Overview 163
6.2 Lunar geochronology 163
6.2.1 General comment 163
6.2.2 Mare Tranquillitatis
geochronology 1^3
6.2.2.1 Introduction 163
6.2.2.2 Apollo II basalts 164
6.2.2.3 Age spectra, low-K basalts 164
6.2.2.4 Age spectra, high-K. basalts 169
6.2.2.5 Argon loss models 171
6.2.3 Apollo 12 basalts 171
6.2.4 Significance of mare basalt dating 173
CONTENTS
6.2.5 Geochronology of the lunar
highlands 174
6.3 Age spectra reflecting episodic argon
loss: examples and applications 178
6.3.1 Introduction 178
6.3.2 Contact aureole studies 178
6.3.3 Sedimentary basin thermal
histories 179
6.3.4 Application of isochron analysis
to partially outgassed xenoliths 181
6.4 Uplift and cooling studies 182
6.4.1 Introduction 182
6.4.2 Simple cooling of an igneous
intrusion 182
6.4.3 Metamorphic cooling histories 184
6.5 Geochronology and paleomagnetism 186
References 191
Index 209
|
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| dewey-ones | 551 - Geology, hydrology, meteorology |
| dewey-raw | 551.7/01 |
| dewey-search | 551.7/01 |
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| discipline | Geologie / Paläontologie Geographie |
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| id | DE-604.BV001790649 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T15:36:04Z |
| institution | BVB |
| isbn | 0195043022 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-001206693 |
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| owner_facet | DE-12 DE-19 DE-BY-UBM DE-473 DE-BY-UBG |
| physical | XI, 212 S. zahlr. graph. Darst. |
| publishDate | 1988 |
| publishDateSearch | 1988 |
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| publisher | Oxford Univ. Press |
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| series | Oxford monographs on geology and geophysics |
| series2 | Oxford monographs on geology and geophysics |
| spelling | McDougall, Ian 1935-2018 Verfasser (DE-588)133204847 aut Geochronology and thermochronology by the 40Ar/39Ar method Ian McDougall and T. Mark Harrison New York [u.a.] Oxford Univ. Press 1988 XI, 212 S. zahlr. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Oxford monographs on geology and geophysics 9 Literaturverz. S. 191 - 208 Argon-argon dating Earth temperature Methode (DE-588)4038971-6 gnd rswk-swf Geochronologie (DE-588)4020199-5 gnd rswk-swf Physikalische Altersbestimmung (DE-588)4174605-3 gnd rswk-swf Argonisotop (DE-588)4142997-7 gnd rswk-swf Physikalische Altersbestimmung (DE-588)4174605-3 s Argonisotop (DE-588)4142997-7 s Geochronologie (DE-588)4020199-5 s DE-604 Methode (DE-588)4038971-6 s Harrison, Timothy Mark 1952- Verfasser (DE-588)128954876 aut Oxford monographs on geology and geophysics 9 (DE-604)BV000017932 9 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=001206693&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | McDougall, Ian 1935-2018 Harrison, Timothy Mark 1952- Geochronology and thermochronology by the 40Ar/39Ar method Oxford monographs on geology and geophysics Argon-argon dating Earth temperature Methode (DE-588)4038971-6 gnd Geochronologie (DE-588)4020199-5 gnd Physikalische Altersbestimmung (DE-588)4174605-3 gnd Argonisotop (DE-588)4142997-7 gnd |
| subject_GND | (DE-588)4038971-6 (DE-588)4020199-5 (DE-588)4174605-3 (DE-588)4142997-7 |
| title | Geochronology and thermochronology by the 40Ar/39Ar method |
| title_auth | Geochronology and thermochronology by the 40Ar/39Ar method |
| title_exact_search | Geochronology and thermochronology by the 40Ar/39Ar method |
| title_full | Geochronology and thermochronology by the 40Ar/39Ar method Ian McDougall and T. Mark Harrison |
| title_fullStr | Geochronology and thermochronology by the 40Ar/39Ar method Ian McDougall and T. Mark Harrison |
| title_full_unstemmed | Geochronology and thermochronology by the 40Ar/39Ar method Ian McDougall and T. Mark Harrison |
| title_short | Geochronology and thermochronology by the 40Ar/39Ar method |
| title_sort | geochronology and thermochronology by the 40ar 39ar method |
| topic | Argon-argon dating Earth temperature Methode (DE-588)4038971-6 gnd Geochronologie (DE-588)4020199-5 gnd Physikalische Altersbestimmung (DE-588)4174605-3 gnd Argonisotop (DE-588)4142997-7 gnd |
| topic_facet | Argon-argon dating Earth temperature Methode Geochronologie Physikalische Altersbestimmung Argonisotop |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=001206693&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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